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st: update hangroot available from ssc


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   stata list <statalist@hsphsun2.harvard.edu>
Subject   st: update hangroot available from ssc
Date   Wed, 19 Dec 2007 12:16:31 +0000 (GMT)

Thanks to Kit Baum an update of the -hangroot- package is now available
from -ssc-. This update includes a minor bugfix and adds a closer
integration with the -betafit- and -paretofit- packages, both
downloadable from -ssc-. To update type -ssc install hangroot, replace-
or -adoupdate, update-. 

-hangroot- creates a hanging rootogram (Tukey 1977, Wainer 1974), which
compares a theoretical distribution with an empirical one, by "hanging"
the histogram from the theoretical distribution, instead of "standing"
the histogram on the x-axis. This way deviations are shown as
deviations from a horizontal line (y=0) instead of deviations from a
curve (the density curve). This makes it easier to spot patterns in the
deviations. Also the y-axis is scaled as the square root of the
frequency instead of the frequency to show deviations in the tails more
clearly.

If -hangroot- is preceded by -betafit- or -paretofit- than typing 
-hangroot- (without specifying a variable name) will automatically
display the fit of the -betafit- or -paretofit- model to the data. I
intend to extend this capability to the other members of the XXfit
family:
 
dagumfit
gammafit
gb2fit
gevfit
gumbelfit
invgammafit
invgaussfit
lognfit
smfit

-- Maarten

-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

http://home.fsw.vu.nl/m.buis/
-----------------------------------------


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